Shears for iron and similar materials



Oct. 2,1923. 1,469,467

A. WAGENBAC-H SHEARS FOR IRON AND SIMILAR MATERIALS Fild 'June 17,1921

December 24, 1917 (iv-50209 1 49 b 2) Patented Oct. 2, 1923.

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Application filed June 17, 1921. Serial No. 78,371

T all whom it may concern:

Be it known that I, ANTON VVAGENBACH, a citizen of the Commonwealth of Germany, and a resident of 'Elberfeld, Germany, have invented new and useful Improvements in Shears for Iron and Similar Materials, for which I have filed application in Germany of which the following is a specification.

In shears for cuttin heavy metal it is a well known practice to connect the hand lever to a driving wheel by means of a pawl. thrown lnto engagement by lts own we1ght,.

and to connect the driving wheel to" a movable jaw in order to' enable the hand lever to effect the cutting operation by being swung up and down repeatedly.

The essential part of the present invention, on the contrary, consists principally in the arrangement of the center of gravitation of the pawl in such manner that when the hand lever is very nearly ina hori- V zontal position, the pawl disengages itself ward movement of the hand lever, and therefrom the teeth of the driving wheel. By this arrangement no clickin of the pawl on the ratchet exists during t e releasing upin awl is rovided which in its turn is res P P 7 leased by the foot of the operator for enabling the movable jaw to make the opening p 7 ascertained the nature of my sald invention, 1 what I claim and desire to secure by Letters:

movement of the shears.

The accompanying drawing shows an example of the shears arrangement.

In said drawings z- Fig. 1 is a side view.

Fig. 2 is an overhead view.

The shears are provided with a rigid cutter 2, built somewhat in the shape of a trestle and res-ting on a bottom plate 1, a movablev cutter 4: being journaled on the latter-by means of a link bolt 3. The two cutters hold the blades 5, 6 in mouth-shaped slits.

In order to operate the with the new pawl cutters, the

movable one 4: is fitted witha toothed wheel sector, which is engaged by a pinion or Y ratchet wheel 10 journaled in a fork of the hand .lever 8, whichswings on a link bolt 9 on the rigid cutter 2. The ratchet wheel 10 is brought into position with respect to the hand lever by means of a shift pawl 12- which swings on a link 11 in the fork of the hand lever. 8.

gaged by the weight arm 13, as long as the The shift pawl is held enhand lever 8 is in an upward oblique position On the other hand, when the said lever reaches a nearly horizontal, position, the

gravitation point of the pawl passes'under disengaged from; the ratchet wheel 10 as soon as the pressure arising from the downward movement of the hand lever 8 ceases;

The pressure on the movable jaw is sustained by means of a clutching pawl 14:

swinging on a bolt 15 on the rigid cutter 2, V

which as a result of the weight of the the swivel link 11. Accordingly the pawl is counter arm 16 has the tendency to catch into the teeth of the toothed wheel sector 7 of the movable. cutter 4. A foot lever 17 serves to disengage the clutching pawl 14, when the cutting operation is finished, by

acting upon theinterior of its. forked counter a arm.

In the special event of a large numberof easy cuts having to be performed in succession, for which it is not necessary to engage and disengage the vpawl separately each time, the hand lever fork 8 is provided in addition with a hole 18 for the purpose of inserting a pin between the teeth of the small ratchet wheel 10, whereby both parts are rigidly locked and the hand lever I is rigidly coupled to the movable cutter.

Having now particularly described and Patent of the United States is '1. Shears for iron and similar materials, provided with ahand lever, a shift pawl arranged on the said hand lever, a toothed position of the hand lever.

2. Shears for iron and similar materials,

'provide'dwitha hand lever, a shift paw arranged on the said hand lever, a toothed wheel and a movable jaw with a toothed arch Q r i 1,469,467

'meshing with said wheel the Said pawl arm of she movable jaw against'the releasbeingfree to engage itself with the ratchet .ing downward movement and with -afoot ,1 wheel by' its own weight in the elevated "l'eveiedapted tee-release the said clutching 0 position of the hand lever, and to disengage. pawlb .v V r 5 itself' while the pressure ceases at; the V In witness whereof I affix my signature. lowered position of the hand Ievefand'pror i Vided with avpawl clutching the driving 1- ANTON WAGENBACH. 

